mr2_rich01 wrote:Not sure on compression ratio but the car is run on shell v power and I think it boosts at 1.6bar max using a gizmo boost controller.. And like has been said if it was knocking Ryan wouldn't have let me leave in the car
I don't think its knock as when it's starts to surge the dump valve keeps going and it starts chattering like the air passing the turbine on the turbo and won't go any higher up the rpm but if I let off to say half or quarter throttle it will..
If I go through the gears full rpm into 4th and 5th there is no problem it's only when it's under heavy load..
1.6 bar is quite high boost and you should have low compression pistons if on road fuel, find out what is fitted as this is very important.
The dump should not be opening up so go back to a stock and try it.
To map an engine for road uses correctly will take days or even weeks but most mappers today only spend what 4 hours, they miss so much out through lack of knowledge.